Few more snacks in the boss server login sequence

DrewML · Dec 25, 2020 · 98f4826 · 98f4826
1 parent ea87e8f
commit 98f4826
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Showing 4 changed files with 90 additions and 24 deletions.
diff --git a/src/BossServer/index.ts b/src/BossServer/index.ts
@@ -1,8 +1,13 @@
 import { timingSafeEqual } from 'crypto';
 import { parseCookieRequest } from './clientSnacs';
 import { OscarServer, OscarSocket } from '../OscarServer';
-import { supportedFamiliesSnac } from './serverSnacs';
-import { assert } from 'console';
+import {
+    supportedFamiliesSnac,
+    familyVersionsSnac,
+    rateLimitInfoSnac,
+} from './serverSnacs';
+import assert from 'assert';
+import { parseSnac, matchSnac } from '../snacUtils';
 
 export class BossServer extends OscarServer {
     onConnection(oscarSocket: OscarSocket) {
@@ -26,7 +31,24 @@ export class BossServer extends OscarServer {
         });
 
         oscarSocket.onChannel(0x2, (flap) => {
-            console.log('boss channel 2 flap: ', flap);
+            const snac = parseSnac(flap.data);
+
+            if (matchSnac(snac, 'GENERAL', 'CLIENT_FAMILY_VERSIONS')) {
+                return oscarSocket.write({
+                    channel: 2,
+                    data: familyVersionsSnac({ reqID: snac.requestID }),
+                });
+            }
+
+            if (matchSnac(snac, 'GENERAL', 'RATE_REQUEST')) {
+                assert(false, 'snac 01,07 not implemented yet');
+                return oscarSocket.write({
+                    channel: 2,
+                    data: rateLimitInfoSnac({ reqID: snac.requestID }),
+                });
+            }
+
+            console.log('boss unhandled channel 2 flap: ', flap);
         });
 
         oscarSocket.onChannel(0x3, (flap) => {

diff --git a/src/BossServer/serverSnacs.ts b/src/BossServer/serverSnacs.ts
@@ -1,6 +1,6 @@
 import { buildSnac } from '../snacUtils';
 import { SNACS } from '../constants';
-import { endianness } from 'os';
+import { uint16BEBuffer } from '../buf';
 
 /**
  * @see http://iserverd.khstu.ru/oscar/snac_01_03.html
@@ -9,30 +9,59 @@ export function supportedFamiliesSnac(opts: { reqID: number }) {
     /**
      * @see http://iserverd.khstu.ru/oscar/families.html
      */
-    const families = Buffer.from(
-        Uint16Array.from([
-            SNACS.GENERAL.family,
-            SNACS.LOCATION.family,
-            SNACS.BUDDYLIST.family,
-            SNACS.ICBM.family,
-            SNACS.INVITATION.family,
-            SNACS.ADMINISTRATIVE.family,
-            SNACS.POPUP_NOTICE.family,
-            SNACS.PRIVACY_MGMT.family,
-            SNACS.USER_LOOKUP.family,
-            SNACS.USAGE_STATS.family,
-            SNACS.SSI.family,
-            SNACS.OFFLINE.family,
-        ]).buffer,
-    );
-    // There has to be less noisy sugar for generating a BE
-    // list of 16 bit ints...
-    if (endianness() === 'LE') families.swap16();
+    const families = uint16BEBuffer([
+        SNACS.GENERAL.family,
+        SNACS.LOCATION.family,
+        SNACS.BUDDYLIST.family,
+        SNACS.ICBM.family,
+        SNACS.INVITATION.family,
+        SNACS.ADMINISTRATIVE.family,
+        SNACS.POPUP_NOTICE.family,
+        SNACS.PRIVACY_MGMT.family,
+        SNACS.USER_LOOKUP.family,
+        SNACS.USAGE_STATS.family,
+        SNACS.SSI.family,
+        SNACS.OFFLINE.family,
+    ]);
 
     return buildSnac({
         family: SNACS.GENERAL.family,
         subtype: SNACS.GENERAL.subtypes.SUPPORTED_FAMILIES,
         reqID: opts.reqID,
-        data: Buffer.from(Uint16Array.from(families).buffer).swap16(),
+        data: families,
     });
 }
+
+/**
+ * @see http://iserverd.khstu.ru/oscar/snac_01_18.html
+ */
+export function familyVersionsSnac(opts: { reqID: number }) {
+    // prettier-ignore
+    const versions = uint16BEBuffer([
+        // family, version
+        SNACS.GENERAL.family, 0x3,
+        SNACS.LOCATION.family, 0x1,
+        SNACS.BUDDYLIST.family, 0x1,
+        SNACS.ICBM.family, 0x1,
+        SNACS.INVITATION.family, 0x1,
+        SNACS.ADMINISTRATIVE.family, 0x1,
+        SNACS.POPUP_NOTICE.family, 0x1,
+        SNACS.PRIVACY_MGMT.family, 0x1,
+        SNACS.USER_LOOKUP.family, 0x1,
+        SNACS.USAGE_STATS.family, 0x1,
+        SNACS.SSI.family, 0x1,
+        SNACS.OFFLINE.family, 0x1,
+    ]);
+
+    return buildSnac({
+        family: SNACS.GENERAL.family,
+        subtype: SNACS.GENERAL.subtypes.SERVER_FAMILY_VERSIONS,
+        reqID: opts.reqID,
+        data: versions,
+    });
+}
+
+export function rateLimitInfoSnac(opts: { reqID: number }) {
+    // TODO: Implement
+    return Buffer.alloc(0);
+}
diff --git a/src/buf.ts b/src/buf.ts
@@ -0,0 +1,12 @@
+import { endianness } from 'os';
+
+const isLE = endianness() === 'LE';
+
+/**
+ * @summary Create a UInt16BE buffer from an array of integers
+ */
+export function uint16BEBuffer(array: number[]) {
+    const buf = Buffer.from(Uint16Array.from(array).buffer);
+    if (isLE) buf.swap16();
+    return buf;
+}
diff --git a/src/constants.ts b/src/constants.ts
@@ -44,6 +44,9 @@ export const SNACS = {
         family: 0x1,
         subtypes: {
             SUPPORTED_FAMILIES: 0x3,
+            CLIENT_FAMILY_VERSIONS: 0x17,
+            SERVER_FAMILY_VERSIONS: 0x18,
+            RATE_REQUEST: 0x6,
         },
     },
     LOCATION: {